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# Problem Tags Rating Solved
1826-C Dreaming of Freedom
greedy math number theory
1300
1826-B Lunatic Never Content
math number theory
1100
1826-A Trust Nobody
brute force greedy implementation +1
1200
1825-B LuoTianyi and the Table
greedy math
1000
1825-A LuoTianyi and the Palindrome String
greedy strings
800
1824-E LuoTianyi and Cartridge
data structures trees
3500
1824-D LuoTianyi and the Function
data structures
3000
1824-C LuoTianyi and XOR-Tree
data structures dfs and similar dp +3
2500
1824-B2 LuoTianyi and the Floating Islands (Hard Version)
combinatorics dfs and similar math +2
2300
1824-B1 LuoTianyi and the Floating Islands (Easy Version)
combinatorics math probabilities +1
1800
1824-A LuoTianyi and the Show
greedy implementation
1400
1823-F Random Walk
dp graphs math +2
2600
1823-E Removing Graph
brute force dp games +2
2500
1823-D Unique Palindromes
constructive algorithms math strings
1900
1823-C Strongly Composite
greedy math number theory
1300
1823-B Sort with Step
brute force math sortings
900
1823-A A-characteristic
combinatorics constructive algorithms math
800
1822-G2 Magic Triples (Hard Version)
brute force data structures math +1
2200
1822-G1 Magic Triples (Easy Version)
brute force data structures math +1
1700
1822-F Gardening Friends
brute force dfs and similar dp +2
1700
1822-E Making Anti-Palindromes
greedy math strings
1600
1822-D Super-Permutation
constructive algorithms math
1200
1822-C Bun Lover
math
800
1822-B Karina and Array
greedy math sortings
800
1822-A TubeTube Feed
brute force implementation
800
1821-F Timber
combinatorics dp fft +1
2600
1821-E Rearrange Brackets
brute force dp greedy +2
2100
1821-D Black Cells
binary search brute force greedy +1
1900
1821-C Tear It Apart
brute force implementation math +1
1300
1821-B Sort the Subarray
brute force greedy
1100
1821-A Matching
combinatorics math
800
1820-B JoJo's Incredible Adventures
math strings two pointers
1100
1820-A Yura's New Name
implementation strings
800
1819-F Willy-nilly, Crack, Into Release!
data structures dp
3500
1819-E Roads in E City
interactive math probabilities +1
3200
1819-D Misha and Apples
brute force data structures dp +1
2800
1819-C The Fox and the Complete Tree Traversal
constructive algorithms dp implementation +2
2400
1819-B The Butcher
geometry greedy implementation +2
1900
1819-A Constructive Problem
brute force greedy
1300
1818-B Indivisible
constructive algorithms
900
1818-A Politics
greedy implementation
800
1817-F Entangled Substrings
string suffix structures strings
3500
1817-E Half-sum
brute force divide and conquer greedy
3400
1817-D Toy Machine
constructive algorithms games implementation
2700
1817-C Similar Polynomials
combinatorics math
2400
1817-B Fish Graph
brute force constructive algorithms dfs and similar +1
1900
1817-A Almost Increasing Subsequence
binary search data structures greedy
1500
1816-B Grid Reconstruction
constructive algorithms greedy
1000
1816-A Ian Visits Mary
constructive algorithms geometry number theory
800
1815-F OH NO1 (-2-3-4)
constructive algorithms graphs math
3500